4.8.14. Fiducial marks

Try these first

1. 1.

   What are fiducial marks?

   Hint

   Think about the edges of the photo.

2. 2.

   What is the purpose of the principal point?

   Hint

   Where do you think most measurements start?

3. 3.

   What are fiducial marks used for?

   • Creating mosaics
   • Measuring distances
   • Aligning photographs

   Hint

   Consider what helps in aligning images.

4. 4.

   True or False: The principal point is located outside the photograph.

   • True
   • False

   Hint

   Does the center refer to inside or outside?

5. 5.

   Explain how one could assess the accuracy of a photogrammetric model with and without the use of fiducial marks.

   Hint

   What would you measure in both scenarios to compare accuracy?

6. 6.

   Develop a plan for a photogrammetric project that emphasizes the importance of fiducial marks in your methodology.

   Hint

   What elements must your plan include to ensure accuracy with fiducial marks?